DHCP

题目

DHCP


相似考题
更多“DHCP”相关问题
  • 第1题:

    In a Bridged 1483 network, which set of configuration commands allows the router to forward requests from the PC to an external DHCP server at 3.3.3.3?()

    A. set dhcp relay 3.3.3.3 set dhcp relay agent

    B. enable dhcp relay agent set dhcp relay agent

    C. set dhcp server 3.3.3.3 enable dhcp relay agent

    D. enable dhcp server 3.3.3.3 enable dhcp relay agent


    参考答案:A

  • 第2题:

    下列关于DHCP服务器与DHCP客户机的交互过程中,错误的是

    A.DHCP客户机广播“DHCP发现”消息时使用的源IP地址是127.0.01DHCP客户机广播"DHCP发现"消息时使用的源IP地址是0.0.0.0

    B.DHCP服务器收到“DHCP发现”消息后,就向网络中广播“DHCP供给”信息

    C.DHCP客户机收到“DHCP供给”消息后向DHCP服务器请求提供IP地址

    D.DHCP服务器广播“DHCP确认”消息,将IP地址分配给DHCP客户机


    正确答案:A

  • 第3题:

    以下属于DHCP SERVER发出的报文有()

    • A、DHCP DISCOVER
    • B、DHCP ACK
    • C、DHCP INFORM
    • D、DHCP REQUEST

    正确答案:D

  • 第4题:

    DHCP客户机申请IP地址租约时首先发送的信息是()

    • A、DHCP discover
    • B、DHCP offer
    • C、DHCP request
    • D、DHCP positive

    正确答案:A

  • 第5题:

    Which of the following types of attacks does DHCP snooping prevent?(Choose all that apply.)()

    • A、Attacker sends multiple DHCP requests flooding DHCP server
    • B、Attacker connects rogue server initiating DHCP requests
    • C、Attacker connects rogue server replying to DHCP requests
    • D、Attacker sends DHCP jam signal causing DHCP server to crash
    • E、Attacker sends gratuitous ARP replies, thereby jamming the DHCP server
    • F、Attacker sends unsolicited DHCP replies, thereby jamming the DHCP server

    正确答案:A,C

  • 第6题:

    Which CLI command enables the DHCP External Server function on an E-series router?()

    • A、service dhcp-external
    • B、set dhcp external server
    • C、set dhcp-external server
    • D、dhcp external server

    正确答案:A

  • 第7题:

    当DHCP服务器收到DHCPDiscover报文时,要回复()报文

    • A、DHCP  release
    • B、DHCP  Request
    • C、DHCP  Offer
    • D、DHCP  Ack

    正确答案:C

  • 第8题:

    如果DHCP客户端发送给DHCP 中继的DHCP Discovery报文中的广播标志位置0,那么DHCP中继回应DHCP客户端的DHCP Offer报文采用()。

    • A、unicast
    • B、broadcast
    • C、multicast
    • D、anycast

    正确答案:A

  • 第9题:

    基站盲启的正确流程是()

    • A、DHCP Discover-DHCP Offer-DHCP Request-DHCP Ack
    • B、DHCP Request-DHCP Ack-DHCP Discover-DHCP Offer
    • C、DHCP Request-DHCP Offer-DHCP Discover-DHCP Ack
    • D、DHCP Discover-DHCP Ack-DHCP Request-DHCP Offer

    正确答案:A

  • 第10题:

    Which command will enable dhcp debugging on a wlan controller?()

    • A、debug dhcp enable
    • B、debug dhcp status enable
    • C、debug dhcp packet enable
    • D、enable debug dhcp packet

    正确答案:C

  • 第11题:

    In a Bridged 1483 network, which set of configuration commands allows the router to forward requests from the PC to an external DHCP server at 3.3.3.3?()

    • A、set dhcp relay 3.3.3.3 set dhcp relay agent
    • B、enable dhcp relay agent set dhcp relay agent
    • C、set dhcp server 3.3.3.3 enable dhcp relay agent
    • D、enable dhcp server 3.3.3.3 enable dhcp relay agent

    正确答案:A

  • 第12题:

    多选题
    Which of the following types of attacks does DHCP snooping prevent?(Choose all that apply.)()
    A

    Attacker sends multiple DHCP requests flooding DHCP server

    B

    Attacker connects rogue server initiating DHCP requests

    C

    Attacker connects rogue server replying to DHCP requests

    D

    Attacker sends DHCP jam signal causing DHCP server to crash

    E

    Attacker sends gratuitous ARP replies, thereby jamming the DHCP server

    F

    Attacker sends unsolicited DHCP replies, thereby jamming the DHCP server


    正确答案: E,C
    解析: 暂无解析

  • 第13题:

    在某台Cisco路由器中定义一个名为test的DHCP地址池(192.168.3.0/26),并保留192.168.3.62/29的IP地址。下列正确的配置语句是(29)。

    A.Router(config)#ip dhcp pooltest Router(dhcp-config)#network 192.168.3.00.0.0.63 Router(dhcp-config)#ip dhcp excluded-address192.168.3.62

    B.Router(config)#ip dhcp poo1 test Router(dhcp-config)#network 192.168.3.0255.255.255.192 Router(dhcp-config)#ip dhcp excluded-address 192.168.3.62255.255.255.248

    C.Router(config)#ip dhcp poo1 test Router(dhcp-config)#network 192.168.3.0/26 Router(dhcp-config)#ip dhcp excluded-address 192.168.3.62/29

    D.Router(config)#ip dhcp excluded-address 192.168.3.56192.168.3.62 Router(config)#ip dhcp pool test Router(dhcp-config)#network 192.168.3.0/26


    正确答案:D
    解析:子网地址是DHCP服务器可以分配给DHCP客户的有效IP地址范围。在DHCP Pool配置模式下,使用命令“networknetwork-number>[mask|/prefix-length]”配置IP地址池的子网地址和子网掩码。其中,子网掩码参数允许以两种形式表达,一种形式常见的点分十进制数表达形式(如 255.255.255.192),另一种形式是给出掩码前缀的长度,即掩码位为“1”的个数,如“255.255.255.192”可以写成“/26”。本试题中,配置DHCP地址池192.168.3.0/26的语句如下:
      Router(dhcp-config)#network192.168.3.0255.255.255.192
      或Router(dhcp-contig)#network192.168.3.0/26
      可以在全局配置模式“Router(config)#”下,使用“ip dhcp excluded-address low-address[high-address]”命令将要保留的地址从IP地址池中排除,使之成为不能动态分配的地址。本试题中,需要排除的IP地址范围是192.168.3.62/29。其中,“/29”是子网掩码255.255.255.248的前缀的长度。由于IP地址192.168.3.62的二进制表示是“1100 0000 1010 1000 0000 0011 1110”,其中阴影部分是子网掩码覆盖的比特范围,因此192.168.3.62/29所表达的IP地址范围是192.168.3.56-192.168.3.63。再由于192.168.3.63是 192.168.3.0/26网段的直接广播地址,需要排除,因此保留IP地址范围192.168.3.62/29的配置语句如下:
      Router(config)#ip dhcp excluded-adclress 192.168.3.56 192.168.3.62
      本试题选项A的“ip dhcp excluded-address192.168.3.62”仅排除单个IP地址192.168.3.62。选项B和选项C保留IP地址配置命令所在的配置模式有误,且不允许出现选项B的“ip dhcp exclude_address192.168.3.62 255.255.255.248”和选项C的“ip dhcp excluded-address 192.168.3.62/29”等带有子网掩码的格式。

  • 第14题:

    以下属于DHCPSERVER发出的报文有()。

    A.DHCP DISCOVER

    B.DHCP ACK

    C.DHCP INFORM

    D.DHCP REQUEST


    参考答案:B

  • 第15题:

    使用()命令停止DHCP服务。

    • A、net start dhcp  server
    • B、jetpack dhcp.mdb
    • C、net stop dhcp  server
    • D、dhcp positive

    正确答案:C

  • 第16题:

    以下属于DHCPSERVER发出的报文有()。

    • A、DHCP DISCOVER
    • B、DHCP ACK
    • C、DHCP INFORM
    • D、DHCP REQUEST

    正确答案:B

  • 第17题:

    Which configuration is correct for a DHCP Relay Proxy?()

    • A、set dhcp relay 1.1.1.1 set dhcp relay 2.2.2.2 set dhcp relay
    • B、set dhcp relay proxy set dhcp relay 1.1.1.1 set dhcp relay 2.2.2.2
    • C、set dhcp relay 1.1.1.1 proxy set dhcp relay 2.2.2.2
    • D、set dhcp relay 1.1.1.1 set dhcp relay 2.2.2.2 proxy

    正确答案:C

  • 第18题:

    ()报文是以广播的形式发送的

    • A、DHCP Release
    • B、DHCP Request
    • C、DHCP Offer
    • D、DHCP Ack

    正确答案:B

  • 第19题:

    DHCP客户端向DHCP服务器发送()报文进行IP租约的更新?

    • A、DHCP Request
    • B、DHCP Release
    • C、DHCP Inform
    • D、DHCP Decline
    • E、DHCP ACK
    • F、DHCP OFFER

    正确答案:A

  • 第20题:

    DHCP客户端收到DHCP ACK报文后如果发现自己即将使用的IP地址已经存在于网络中,那么它将向DHCP服务器发送什么报文?()

    • A、DHCP Request
    • B、DHCP Release
    • C、DHCP Inform
    • D、DHCP Decline

    正确答案:D

  • 第21题:

    当DHCP客户端收到服务器的DHCP Offer报文时,要回复()报文

    • A、DHCP Release
    • B、DHCP Request
    • C、DHCP Offer
    • D、DHCP Ack

    正确答案:B

  • 第22题:

    Which three statements about the DHCP snooping feature on Cisco Nexus switches are true? ()

    • A、 DHCP snooping commands are not available until the feature is enabled with the feature dhcp- snooping command.
    • B、 When you enable the DHCP snooping feature, the switch begins building and maintaining the DHCP snooping binding database.
    • C、 The switch will not validate DHCP messages received or use the DHCP snooping binding database to validate subsequent requests from untrusted hosts until DHCP snooping is enabled globally and for each specific VLAN.
    • D、 Globally disabling DHCP snooping removes all DHCP snooping configuration on the switch.
    • E、 Globally disabling DHCP snooping does not remove any DHCP snooping configuration or the configuration of other features that are dependent upon the DHCP snooping feature.

    正确答案:B,C,E

  • 第23题:

    In a Bridged 1483 network,which set of configuration commands allows the router to forward requests from the PC to an external DHCP server at 1.1.1.1?()

    • A、set dhcp relay set dhcp server 1.1.1.1
    • B、set dhcp relay agent set dhcp relay 1.1.1.1
    • C、enable dhcp relay enabled hcp server 1.1.1.1
    • D、enable dhcp relay agent enable dhcp relay 1.1.1.1

    正确答案:B

  • 第24题:

    单选题
    使用()命令停止DHCP服务。
    A

    net start dhcp  server

    B

    jetpack dhcp.mdb

    C

    net stop dhcp  server

    D

    dhcp positive


    正确答案: C
    解析: 暂无解析